航 空 发 动 机 篦 齿 ⁃橡 胶 涂 层 机 匣 碰 摩 实 验

To verify the rotor-stator vibration characteristics induced by rubbing between the labyrinth and rubber-coated case for aero-engine booster，a local rubbing experimental device was designed for rotor-stator. The time-frequency domain variations of rotor vibrational displacement，the vibration acceleration of the case and the base，the strain of the case and the elastic support，as well as case temperature were measured and analyzed systematically at various rubbing speeds. The results show that the rotor-stator rubbing features are significantly affected by the wear and fusion of the rubber coating，which results in a variational contacting status between rotor and stator during the rubbing process. The rubbing shows features of high energy，strong transient state and short-time self-separation. A typical period of abrupt change and recovery in short time can be observed for the monitored signals during the rub⁃ bing. The rotor-stator coupling vibration is excited by rubbing，inducing resonance at natural frequencies of the rotor and the stator. In the meanwhile，the modulation vibration between the casing natural frequency and rotor frequency is captured.